Tested USB host functionality on DA830 EVM.
Signed-off-by: Ajay Kumar Gupta ajay.gupta@ti.com Signed-off-by: Swaminathan S swami.iyer@ti.com --- drivers/usb/musb/Makefile | 1 + drivers/usb/musb/da8xx.c | 138 +++++++++++++++++++++++++++++++++++++++++++++ drivers/usb/musb/da8xx.h | 79 ++++++++++++++++++++++++++ include/usb.h | 3 +- 4 files changed, 220 insertions(+), 1 deletions(-) create mode 100644 drivers/usb/musb/da8xx.c create mode 100644 drivers/usb/musb/da8xx.h
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile index 09e0a5f..eb4d8fd 100644 --- a/drivers/usb/musb/Makefile +++ b/drivers/usb/musb/Makefile @@ -27,6 +27,7 @@ LIB := $(obj)libusb_musb.a
COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o COBJS-$(CONFIG_USB_DAVINCI) += davinci.o +COBJS-$(CONFIG_USB_DA8XX) += da8xx.o
COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c new file mode 100644 index 0000000..5b02e33 --- /dev/null +++ b/drivers/usb/musb/da8xx.c @@ -0,0 +1,138 @@ +/* + * da8xx.c - TI's DA8xx platform specific usb wrapper functions. + * + * Author: Ajay Kumar Gupta ajay.gupta@ti.com + * + * Based on drivers/usb/musb/davinci.c + * + * Copyright (c) 2009 Texas Instruments Incorporated + * + * This package is free software; you can redistribute it and/or + * modify it under the terms of the license found in the file + * named COPYING that should have accompanied this file. + * + * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + */ +#include <common.h> +#include <asm/arch/hardware.h> +#include <asm/arch/gpio_defs.h> + +#include "da8xx.h" + +/* MUSB platform configuration */ +struct musb_config musb_cfg = { + (struct musb_regs *)DA8XX_USB_OTG_CORE_BASE, + DA8XX_USB_OTG_TIMEOUT, + 0 +}; + +/* + * This function enables VBUS by driving the GPIO Bank4 Pin 15 high. + */ +static void enable_vbus(void) +{ + u32 value; + + /* configure GPIO bank4 pin 15 in output direction */ + value = readl(&davinci_gpio_bank45->dir); + writel((value & (~DA8XX_USB_VBUS_GPIO)), &davinci_gpio_bank45->dir); + + /* set GPIO bank4 pin 15 high to drive VBUS */ + value = readl(&davinci_gpio_bank45->set_data); + writel((value | DA8XX_USB_VBUS_GPIO), &davinci_gpio_bank45->set_data); +} + +/* + * Enable the usb0 phy. This initialization procedure is explained in + * the DA8xx USB user guide document. + */ +static u8 phy_on(void) +{ + u32 timeout; + u32 cfgchip2; + + cfgchip2 = readl(&davinci_syscfg_regs->cfgchip2); + + cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN | + CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ); + cfgchip2 |= CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN | CFGCHIP2_PHY_PLLON | + CFGCHIP2_REFFREQ_24MHZ; + + writel(cfgchip2, &davinci_syscfg_regs->cfgchip2); + + /* wait until the usb phy pll locks */ + timeout = musb_cfg.timeout; + while (timeout--) + if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD) + return 1; + + /* USB phy was not turned on */ + return 0; +} + +/* + * Disable the usb phy + */ +static void phy_off(void) +{ + u32 cfgchip2; + + /* + * Power down the on-chip PHY. + */ + cfgchip2 = readl(&davinci_syscfg_regs->cfgchip2); + cfgchip2 &= ~CFGCHIP2_PHY_PLLON; + cfgchip2 |= CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN; + writel(cfgchip2, &davinci_syscfg_regs->cfgchip2); +} + +/* + * This function performs DA8xx platform specific initialization for usb0. + */ +int musb_platform_init(void) +{ + u32 revision; + + /* enable psc for usb2.0 */ + lpsc_on(33); + + /* enable usb vbus */ + enable_vbus(); + + /* reset the controller */ + writel(0x1, (DA8XX_USB_OTG_BASE + DA8XX_USB_CTRL_REG)); + udelay(5000); + + /* start the on-chip usb phy and its pll */ + if (phy_on() == 0) + return -1; + + /* Returns zero if e.g. not clocked */ + revision = readl(DA8XX_USB_OTG_BASE + DA8XX_USB_VERSION_REG); + if (revision == 0) + return -1; + + /* Disable all interrupts */ + writel((DA8XX_USB_USBINT_MASK | DA8XX_USB_TXINT_MASK | + DA8XX_USB_RXINT_MASK), + (DA8XX_USB_OTG_BASE + DA8XX_USB_INT_MASK_SET_REG)); + return 0; +} + +/* + * This function performs DA8xx platform specific deinitialization for usb0. + */ +void musb_platform_deinit(void) +{ + /* Turn of the phy */ + phy_off(); + + /* flush any interrupts */ + writel((DA8XX_USB_USBINT_MASK | DA8XX_USB_TXINT_MASK | + DA8XX_USB_RXINT_MASK), + (DA8XX_USB_OTG_BASE + DA8XX_USB_INT_MASK_CLR_REG)); + writel(0, (DA8XX_USB_OTG_BASE + DA8XX_USB_EOI_REG)); +} diff --git a/drivers/usb/musb/da8xx.h b/drivers/usb/musb/da8xx.h new file mode 100644 index 0000000..7d36588 --- /dev/null +++ b/drivers/usb/musb/da8xx.h @@ -0,0 +1,79 @@ +/* + * da8xx.h -- TI's DA8xx platform specific usb wrapper definitions. + * + * Author: Ajay Kumar Gupta ajay.gupta@ti.com + * + * Based on drivers/usb/musb/davinci.h + * + * Copyright (c) 2009 Texas Instruments Incorporated + * + * This package is free software; you can redistribute it and/or + * modify it under the terms of the license found in the file + * named COPYING that should have accompanied this file. + * + * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + */ +#ifndef __DA8XX_MUSB_H__ +#define __DA8XX_MUSB_H__ + +#include "musb_core.h" + +/* extern functions */ +extern void lpsc_on(unsigned int id); + +/* Base address of da8xx usb0 wrapper */ +#define DA8XX_USB_OTG_BASE 0x01E00000 + +/* Base address of da8xx musb core */ +#define DA8XX_USB_OTG_CORE_BASE (DA8XX_USB_OTG_BASE + 0x400) + +/* Timeout for DA8xx usb module */ +#define DA8XX_USB_OTG_TIMEOUT 0x3FFFFFF + +/* For now include usb OTG module registers here */ +#define DA8XX_USB_VERSION_REG 0x00 +#define DA8XX_USB_CTRL_REG 0x04 +#define DA8XX_USB_INT_MASK_SET_REG 0x30 +#define DA8XX_USB_INT_MASK_CLR_REG 0x34 +#define DA8XX_USB_EOI_REG 0x3c + +#define DA8XX_USB_TX_ENDPTS_MASK 0x1f /* ep0 + 4 tx */ +#define DA8XX_USB_RX_ENDPTS_MASK 0x1e /* 4 rx */ +#define DA8XX_USB_TXINT_SHIFT 0 +#define DA8XX_USB_RXINT_SHIFT 8 + +#define DA8XX_USB_USBINT_MASK 0x01ff0000 /* 8 Mentor, DRVVBUS */ +#define DA8XX_USB_TXINT_MASK \ + (DA8XX_USB_TX_ENDPTS_MASK << DA8XX_USB_TXINT_SHIFT) +#define DA8XX_USB_RXINT_MASK \ + (DA8XX_USB_RX_ENDPTS_MASK << DA8XX_USB_RXINT_SHIFT) + +/* DA8xx CFGCHIP2 (USB 2.0 PHY Control) register bits */ +#define CFGCHIP2_PHYCLKGD (1 << 17) +#define CFGCHIP2_VBUSSENSE (1 << 16) +#define CFGCHIP2_RESET (1 << 15) +#define CFGCHIP2_OTGMODE (3 << 13) +#define CFGCHIP2_NO_OVERRIDE (0 << 13) +#define CFGCHIP2_FORCE_HOST (1 << 13) +#define CFGCHIP2_FORCE_DEVICE (2 << 13) +#define CFGCHIP2_FORCE_HOST_VBUS_LOW (3 << 13) +#define CFGCHIP2_USB1PHYCLKMUX (1 << 12) +#define CFGCHIP2_USB2PHYCLKMUX (1 << 11) +#define CFGCHIP2_PHYPWRDN (1 << 10) +#define CFGCHIP2_OTGPWRDN (1 << 9) +#define CFGCHIP2_DATPOL (1 << 8) +#define CFGCHIP2_USB1SUSPENDM (1 << 7) +#define CFGCHIP2_PHY_PLLON (1 << 6) /* override PLL suspend */ +#define CFGCHIP2_SESENDEN (1 << 5) /* Vsess_end comparator */ +#define CFGCHIP2_VBDTCTEN (1 << 4) /* Vbus comparator */ +#define CFGCHIP2_REFFREQ (0xf << 0) +#define CFGCHIP2_REFFREQ_12MHZ (1 << 0) +#define CFGCHIP2_REFFREQ_24MHZ (2 << 0) +#define CFGCHIP2_REFFREQ_48MHZ (3 << 0) + +#define DA8XX_USB_VBUS_GPIO (1 << 15) +#endif /* __DA8XX_MUSB_H__ */ + diff --git a/include/usb.h b/include/usb.h index 7c47098..7c56ace 100644 --- a/include/usb.h +++ b/include/usb.h @@ -183,7 +183,8 @@ struct usb_device { #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \ defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \ defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \ - defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) + defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \ + defined(CONFIG_USB_DA8XX)
int usb_lowlevel_init(void); int usb_lowlevel_stop(void);